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POusing gsub to modify output of xtable command
 

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  1. POusing gsub to modify output of xtable command
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    <p>my.mat &lt;- cbind(1:5, rnorm(5), 6:10, rnorm(5)) colnames(my.mat) &lt;- c("Turn", "Draw","Turn", "Draw") print(xtable(my.mat))</p> <p>yields </p> <pre><code>\begin{table}[ht] \begin{center} \begin{tabular}{rrrrr} \hline &amp; Turn &amp; Draw &amp; Turn &amp; Draw \\ \hline 1 &amp; 1.00 &amp; -0.72 &amp; 6.00 &amp; 0.91 \\ 2 &amp; 2.00 &amp; 0.57 &amp; 7.00 &amp; 0.56 \\ 3 &amp; 3.00 &amp; 1.08 &amp; 8.00 &amp; 0.55 \\ 4 &amp; 4.00 &amp; 0.95 &amp; 9.00 &amp; 0.46 \\ 5 &amp; 5.00 &amp; 1.94 &amp; 10.00 &amp; 1.06 \\ \hline \end{tabular} \end{center} \end{table} </code></pre> <p>I want to filter out the \begin{table} and \end{table} lines. I can do this using gsub, but how to I get the results of print(xtable(... into a variable?</p> <p>Thanks for the help Stack Overflow R community!</p> <hr> <p><strong>EDIT - Making progress</strong></p> <p>In my .Rnw, I have</p> <pre><code>\begin{tablehere} { &lt;&lt;echo=false,results=tex&gt;&gt;= library(xtable) my.mat &lt;- cbind(1:5, rnorm(5), 6:10, rnorm(5)) colnames(my.mat) &lt;- c("Turn", "Draw","Turn", "Draw") #print(xtable(my.mat)) x &lt;- capture.output(print(xtable(my.mat))) x &lt;- gsub("\\\\begin\\{tabular\\}.*", "", x, perl=TRUE) x &lt;- gsub("\\\\end\\{tabular\\}.*", "", x, perl=TRUE) print(x) @ } \end{tablehere} </code></pre> <p>which leads to</p> <pre><code>\begin{tablehere} { [1] "% latex table generated in R 2.9.2 by xtable 1.5-5 package" [2] "% Mon May 17 20:23:09 2010" [3] "\\begin{table}[ht]" [4] "\\begin{center}" [5] "" [6] " \\hline" [7] " &amp; Turn &amp; Draw &amp; Turn &amp; Draw \\\\ " [8] " \\hline" [9] "1 &amp; 1.00 &amp; -1.76 &amp; 6.00 &amp; 0.70 \\\\ " [10] " 2 &amp; 2.00 &amp; 1.58 &amp; 7.00 &amp; 2.57 \\\\ " [11] " 3 &amp; 3.00 &amp; -1.80 &amp; 8.00 &amp; 0.47 \\\\ " [12] " 4 &amp; 4.00 &amp; -2.25 &amp; 9.00 &amp; -0.63 \\\\ " [13] " 5 &amp; 5.00 &amp; 1.99 &amp; 10.00 &amp; -0.35 \\\\ " [14] " \\hline" [15] "" [16] "\\end{center}" [17] "\\end{table}" } \end{tablehere} </code></pre> <p>which is so close. How do I get R to print the right way?</p>
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      1. POusing gsub to modify output of xtable command
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    1. COTwo things would help: can you include the `gsub()` code you're trying to use now? And what exactly do you mean, get the results of print(xtable(... into a variable? Do you mean: into a structure that you could pass to gsub?
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      1. USMatt Parker
    2. CO>Do you mean: into a structure that you could pass to gsub? – Matt Parker 23 mins ago Yes. I realize I can use Shane's method below, and I can suppress the output of print by sending the output to a text file, e.g. print(xtable(my.mat), file="tmp.R") but then when I print the x object, the latex code is stored as the first element of a vector, so I print it and I get a [1] "...the table..." where I just want to print ...the table...
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